阅读说明：本技术 污泥-生物质颗粒燃料棒制备装置及方法 (Device and method for preparing sludge-biomass particle fuel rod ) 是由 徐少娟 吴祖良 楼军 金孝祥 凌立军 于 2019-09-10 设计创作，主要内容包括：本发明提供一种污泥-生物质颗粒燃料棒制备装置：包括搅拌装置、污泥输送装置和造粒干燥装置；所述搅拌装置包括污泥-生物质储存仓,污泥-生物质储存仓上设置有与其内腔连通的生物质进料口、污泥进料口和稳定剂及防腐剂进料口；污泥-生物质储存仓设置有搅拌器,所述封闭式半干污泥储存仓内腔中的螺旋给料机与造粒机连接；所述造粒机位于多孔网状往返式运送带正上方；本发明还提供一种污泥-生物质颗粒燃料棒制备方法：采用先湿法造粒形成颗粒棒再烘干的方法,增大了烘干过程中污泥-生物质颗粒的接触面积,使烘干效率大大增加,能源消耗大大减少。本发明较现有装置相比结构简单,操作方便,检修方便快捷。(the invention provides a preparation device of a sludge-biomass particle fuel rod, which comprises the following steps: comprises a stirring device, a sludge conveying device and a granulation drying device; the stirring device comprises a sludge-biomass storage bin, and a biomass feed inlet, a sludge feed inlet and a stabilizer and preservative feed inlet which are communicated with the inner cavity of the sludge-biomass storage bin are arranged on the sludge-biomass storage bin; the sludge-biomass storage bin is provided with a stirrer, and a screw feeder in the inner cavity of the closed semi-dry sludge storage bin is connected with the granulator; the granulator is positioned right above the porous mesh reciprocating type conveying belt; the invention also provides a preparation method of the sludge-biomass particle fuel rod, which comprises the following steps: the method of forming the particle rod by wet granulation and then drying is adopted, so that the contact area of sludge and biomass particles in the drying process is increased, the drying efficiency is greatly increased, and the energy consumption is greatly reduced. Compared with the prior device, the invention has simple structure, convenient operation and convenient and rapid maintenance.)

1. Mud-living beings pellet fuel rod preparation facilities which characterized in that: comprises a stirring device (1), a sludge conveying device (2) and a granulation drying device (3);

The stirring device (1) comprises a sludge-biomass storage bin (1-4), and a biomass feed port (1-1), a sludge feed port (1-2) and a stabilizer and preservative feed port (1-5) which are communicated with the inner cavity of the sludge-biomass storage bin (1-4) are arranged on the sludge-biomass storage bin (1-4); the sludge-biomass storage bin (1-4) is provided with a stirrer (1-3),

The screw feeder in the inner cavity of the closed semi-dry sludge storage bin (3-1) is connected with the granulator (3-2); the granulator (3-2) is positioned right above the porous mesh reciprocating type conveying belt (3-4); the hot flue gas inlet (3-5) is positioned under the porous mesh reciprocating type conveying belt (3-4);

The sludge-biomass storage bin (1-4) is connected with the closed semi-dry sludge storage bin (3-1) through a sludge conveying device (2).

2. The sludge-biomass pellet fuel rod manufacturing apparatus as set forth in claim 1, wherein:

The number of the porous reticular reciprocating conveyor belts (3-4) is at least three, all the porous reticular reciprocating conveyor belts (3-4) are sequentially arranged from top to bottom, and the arrangement mode of the porous reticular reciprocating conveyor belts (3-4) is in a left-right staggered mode.

3. the sludge-biomass pellet fuel rod manufacturing apparatus as set forth in claim 2, wherein:

and a filter screen is arranged on the sludge feeding hole (1-2).

4. The sludge-biomass pellet fuel rod manufacturing apparatus as set forth in claim 3, wherein:

the mesh size of the porous mesh reciprocating type conveying belt (3-4) is 5-10 mm.

5. The method for manufacturing a sludge-biomass pellet fuel rod using the apparatus for manufacturing a sludge-biomass pellet fuel rod as set forth in any one of claims 1 to 4, wherein: the method comprises the following steps:

1) Drying the sludge until the water content is 70-80% to obtain pretreated sludge;

2) Drying the biomass raw material until the water content is 10% -20%, and then crushing the biomass raw material, wherein the particle size of the crushed biomass raw material is 3-6 mm;

3) mixing the preservative, the stabilizer, the sludge pretreated in the step 1) and the biomass raw material crushed in the step 2), and uniformly stirring to obtain semi-dry sludge-biomass particles;

The mass ratio of the pretreated sludge to the crushed biomass raw materials to the preservative to the stabilizer is 48: 50: 1: 1;

4) conveying the semi-dry sludge particles formed in the step 3) to a closed semi-dry sludge storage bin (3-1) through a sludge conveying device (2);

5) The semi-dry sludge-biomass particles in the closed semi-dry sludge storage bin (3-1) fall onto a plurality of groups of rolling rotary drums on the granulator (3-2) through a screw feeder;

6) Then, carrying out extrusion forming through a rotary drum of a granulator (3-2) to obtain initial formed granular fuel, wherein the grain size of the granules is 10-15 mm;

7) The initial forming granular fuel falls onto the porous reticular reciprocating type conveying belt (3-4), and the initial forming granular fuel passes through the porous reticular reciprocating type conveying belt (3-4) layer by layer from top to bottom; meanwhile, hot flue gas at the temperature of 120-150 ℃ enters a closed semi-sludge storage bin (3-1) from a hot flue gas inlet (3-5), and the hot flue gas passes through a porous net-shaped reciprocating conveyor belt (3-4) from bottom to top to dry the initially formed granular fuel layer by layer and dry for 4.5-5.5 minutes to obtain the sludge-biomass granular fuel rod.

6. The method for preparing a sludge-biomass pellet fuel rod as claimed in claim 5, wherein:

The sludge used in the step 1) is municipal sludge with the water content of about 90 percent generated in urban life or industry.

7. The method for preparing a sludge-biomass pellet fuel rod as claimed in claim 6, wherein:

The preservative is ferric oxide preservative, and the stabilizer is calcium phosphate stabilizer.

Technical Field

The invention belongs to the fields of biomass fuel technology and solid waste recycling, and particularly relates to a device and a method for preparing a sludge-biomass particle fuel rod.

Background

Biomass (bioglass) refers specifically to the collective name of all living and dead biological matter and metabolic products on earth. Compared with petroleum fuels which are widely used at present, the biomass fuel is not only a unique renewable carbon source, but also has the advantages of no net carbon emission, low sulfur content and biodegradability. In recent years, biomass energy has been focused on its characteristics such as practicality, feasibility, and versatility. The biomass energy source is wide, and sugarcane, corn, straw and some industrial organic garbage can be used as raw materials. Therefore, the preparation of such environmentally friendly renewable fuels is of great significance.

Municipal sludge is a byproduct produced in the municipal wastewater treatment process and is a complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids and the like. In recent years, the municipal sludge amount in China is huge, the yield is about 150 ten thousand tons every year, more than one half of the sludge is not effectively treated, and the sludge brings serious threat to the ecological environment. Therefore, the effective treatment of municipal sludge has become an urgent problem to be solved in today's society.

In the sludge treatment technology at the present stage, the water content of the sludge after mechanical dehydration is generally more than 60%. The sludge heat drying can further remove the water in the sludge through the heat transfer effect between the sludge and the heating medium so as to further reduce the volume of the sludge, and the water content can reach below 30 percent. The odor, pathogens, viscosity, instability and other conditions of the dried sludge are obviously improved, and the dried sludge can be used as fuel, fertilizer, soil conditioner, building materials and the like. Generally speaking, the heat drying process should be combined with waste heat utilization, and it is not suitable to separately install the heat drying process, and the methane heat energy, the waste heat of garbage and sludge incineration, the waste heat of thermal power plant or other waste heat generated in the anaerobic digestion treatment process of sludge can be fully utilized to dry wet sludge. The sludge heat drying equipment can be divided into a direct heating type, an indirect heating type and a direct/indirect combined drying type according to the contact mode of a heat medium and sludge. According to the process types, the method can be divided into five types, namely fluidized bed drying, belt type drying, blade type drying, horizontal rotating disc type drying, vertical disc type drying and the like. The fluidized bed drying technology is a new type of drying technology developed in recent years, the process is that the bulk material is placed on a pore plate, and the gas is conveyed from the lower part of the pore plate, so that the material particles move on a gas distribution plate and are in a suspension state in the gas flow, a mixed bottom layer of the material particles and the gas is generated, the material particles in the fluidized bed dryer are fully contacted with the gas in the mixed bottom layer, the heat transfer and the moisture transfer between the material and the gas are carried out, and the advantages of low emission, no environmental pollution, convenient loading and unloading, convenient transportation and the like are achieved. But has the defects of uneven airflow condition and basically complete mixing type particle movement, and causes excessive dust content. The main body of the rotary disc type dryer is composed of a rotary drum type shell and a group of rotary discs which penetrate through the center, the rotary disc group is hollow, a heat medium passes through the middle of the rotary disc group and indirectly conducts heat to sludge, water vapor formed by evaporation of water in the sludge is collected in a dome above the rotary disc and is taken out of the dryer by a small amount of ventilation, and the rotary disc type dryer has the characteristics of low oxygen content, low temperature and dust content, good safety and the like during operation. Thus, both methods are widely used in the drying process. However, the rotating disc type dryer has the problems of low drying speed, high energy consumption and the like.

accordingly, there is a need for improvements in the art.

disclosure of Invention

the invention aims to provide an efficient preparation device and method for a sludge-biomass particle fuel rod.

In order to solve the technical problem, the invention provides a preparation device of a sludge-biomass particle fuel rod, which comprises the following steps: comprises a stirring device, a sludge conveying device and a granulation drying device;

The stirring device comprises a sludge-biomass storage bin, and a biomass feed inlet, a sludge feed inlet and a stabilizer and preservative feed inlet which are communicated with the inner cavity of the sludge-biomass storage bin are arranged on the sludge-biomass storage bin; the sludge-biomass storage bin is provided with a stirrer,

The screw feeder in the inner cavity of the closed semi-dry sludge storage bin is connected with the granulator; the granulator is positioned right above the porous mesh reciprocating type conveying belt; the hot flue gas inlet is positioned right below the porous mesh reciprocating type conveying belt;

the sludge-biomass storage bin is connected with the closed semi-dry sludge storage bin through a sludge conveying device.

as an improvement of the preparation device of the sludge-biomass particle fuel rod of the invention:

the number of the porous reticular reciprocating type conveying belts is at least three, all the porous reticular reciprocating type conveying belts are sequentially arranged from top to bottom, and the arrangement mode of the porous reticular reciprocating type conveying belts is a left-right staggered mode.

As a further improvement of the preparation device of the sludge-biomass particle fuel rod of the invention:

And a filter screen is arranged on the sludge feeding hole.

as a further improvement of the preparation device of the sludge-biomass particle fuel rod of the invention:

the mesh size of the porous mesh reciprocating type conveying belt is 5-10 mm.

The invention also provides a preparation method of the sludge-biomass particle fuel rod, which comprises the following steps: the method comprises the following steps:

1) Drying the sludge until the water content is 70-80% to obtain pretreated sludge;

2) drying the biomass raw material until the water content is 10% -20%, and then crushing the biomass raw material, wherein the particle size of the crushed biomass raw material is 3-6 mm;

3) Mixing a preservative, a stabilizer, the sludge pretreated in the step 1) and the biomass raw material crushed in the step 2), and uniformly stirring to obtain semi-dry sludge-biomass particles (with the water content of 40-50%);

The mass ratio of the pretreated sludge to the crushed biomass raw materials to the preservative to the stabilizer is 48: 50: 1: 1;

4) Conveying the semi-dry sludge particles formed in the step 3) to a closed semi-dry sludge storage bin through a sludge conveying device;

5) The semi-dry sludge-biomass particles in the closed semi-dry sludge storage bin fall onto a plurality of groups of rolling rotary drums on the granulator through a screw feeder;

6) then, carrying out extrusion forming through a rotary drum of a granulator to obtain initial formed granular fuel, wherein the grain size of the granules is 10-15 mm;

7) the initial forming granular fuel falls onto the porous reticular reciprocating conveyor belt, and the initial forming granular fuel passes through the porous reticular reciprocating conveyor belt layer by layer from top to bottom; and meanwhile, hot flue gas at the temperature of 120-150 ℃ enters a closed semi-sludge storage bin from a hot flue gas inlet, and the hot flue gas passes through a porous net-shaped reciprocating type conveying belt from bottom to top to dry the initially formed granular fuel layer by layer and dry for 4.5-5.5 minutes to obtain the sludge-biomass granular fuel rod.

as an improvement of the preparation method of the sludge-biomass particle fuel rod of the invention:

The sludge used in the step is municipal sludge with the water content of about 90 percent generated in urban life or industry.

As a further improvement of the preparation method of the sludge-biomass particle fuel rod of the invention:

The preservative is ferric oxide preservative, and the stabilizer is calcium phosphate stabilizer.

The device and the method for preparing the sludge-biomass particle fuel rod have the technical advantages that:

1, a method of forming a particle rod by wet granulation and then drying is adopted, so that the contact area of sludge and biomass particles in the drying process is increased, the drying efficiency is greatly increased, and the energy consumption is greatly reduced.

2 the adoption of the porous net-shaped reciprocating conveyer belt made of iron instead of the belt conveyer belt can ensure that the hot flue gas can dry sludge-biomass particles through the pores of the conveyer belt, thereby effectively utilizing the hot flue gas and reducing the energy consumption.

3 the rotating speed of the rotary drum of the granulator, the rotating speed of the stirrer and the conveying speed of the porous mesh reciprocating conveyer belt can be adjusted according to the actual requirement of the water content of the sludge, and the granulator has good flexibility in engineering application.

4 the fuel rod is prepared by mixing the sludge and the biomass particles, so that the water content of the sludge can be quickly reduced, the heat value of sludge combustion is improved, and the scaling problem of biomass combustion is reduced.

Compared with the prior device, the invention has simple structure, convenient operation and convenient and rapid maintenance.

drawings

the following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is an overall schematic view of a sludge-biomass pellet fuel rod manufacturing apparatus according to the present invention.

fig. 2 is a schematic view of the stirring device of fig. 1.

FIG. 3 is a schematic view of the conveyor and the granulating and drying apparatus shown in FIG. 1.

Fig. 4 is a schematic view of the multi-hole shuttle conveyor belt of fig. 1.

the device comprises a stirring device 1, a biomass feeding port 1-1, a sludge feeding port 1-2, a stirrer 1-3, a biomass-sludge storage bin 1-4, a stabilizer and preservative feeding port 1-5, a sludge conveying device 2, a granulation drying device 3, a closed semi-sludge storage bin 3-1, a granulator 3-2, a cold flue gas outlet 3-3, a porous net-shaped reciprocating conveying belt 3-4, a hot flue gas inlet 3-5 and a biomass-sludge particle combustion rod outlet 3-6.

Detailed Description

the invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.